Abstract
We experimentally demonstrate 15dB of Raman amplification of 1115nm pulses in an orbital angular momentum mode (OAMM) with charge l=+2, S=+1 in 5m of step-index 25μm-diameter-core fiber. The total output reaches 4.5kW of peak power and 68.5μJ of energy in ∼15 ns pulses at 4kHz repetition rate. An Yb-doped fiber source pumps the Raman amplifier at 1060nm with 60ns pulses. Using a spatial light modulator for modal decomposition, we measure 83% purity for the amplified target OAMM of selected polarization. To the best of our knowledge, this is the first time high energy, peak power, gain, and purity are achieved in a fiber Raman amplifier for a single OAMM.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
